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Grand Pre hits the runway

From the first time you turn on the Peachtree Audio Grand Pre X-1 you'll become aware of a sense of pure potential. The feeling that this preamp could actually be ready for anything you might throw at it. You know that feeling when your jet is next in line on the runway, and you can feel the massive engine turbines ramping up? Yes, like that. It's throttle time. Are you ready for takeoff?

Hand-tweaked for the digital universe

This X-1 iteration of the Grand Pre features a specially designed XMOS receiving chip, which makes high-resolution audio easier for your computer to handle by simplifying or eliminating the drivers your computer requires. This preamp is loaded with sophisticated connection options — from the asynchronous I2S 24-bit/192kHz USB input, which minimizes jitter in the computer's digital signal before it ever enters the Grand Pre X-1's built-in DAC, to the 5 digital inputs (1 BNC, 2 coaxial, 2 optical). There's healthy analog support as well, with specialized balanced XLR and unbalanced RCA inputs and preamp outputs available. You're booking down the runway now.

Your signal, treated with respect

Your sources won't achieve their maximum potential, though, without innovative signal processing and clean, well-isolated power pathways. The Grand Pre X-1 features an industry-leading ESS Sabre32 ES9018 Reference DAC, so you know your computer audio files will sound exactly as their creators intended them. A dual-tube buffer stage, designed by audio legend Bascom King, employs two equally legendary 12AU7 vacuum tubes to help restore some warmth and luster to compressed digital sources. They also set your high-res sources free to soar. The tube buffer is switchable, so you can listen with or without it in the circuit and see which sounds better to you. And the on-board high-performance headphone amplifier will help you enjoy every detail and nuance of the music when you need to keep your listening private. Picture yourself immersed in the flow of the music and feel the ground slip away.

Not just another pretty face

Ready for business

Now that you're airborne, take a good hard look at the pictures here and tell us what you see. Be honest. It's nice looking, isn't it? Minimalist, clean, with every control you need readily identified and easily available. It's not just a pretty face — that front plate is 1/2-inch thick aluminum. The control buttons are titanium. The people at Peachtree Audio aren't messing around. The Grand Pre X-1 is built to deal it out.

You know what else uses 1/2-inch thick aluminum and titanium? Some jet airplane parts. Coincidence? You may now turn on your electronic devices.

Product Research

Features

Overview: The Peachtree Audio Grand Pre X1 is a blend of a high-quality,
high-resolution DAC with a true state-of-the art hybrid tube preamp. The Peachtree Audio Grand Pre X1
features cutting edge digital-to-analog conversion with digital connectivity
designed for the modern day music listener. Both analog and digital sources will
sound exceptional, and the addition of balanced inputs and outputs allow it to
connect with the best sources and amplifiers. The Grand Pre X1 will take your
computer audio, streaming audio devices, and even your CD player to a reference
level, high-resolution sound.

Digital-to-Analog Converter: At the heart of the Grand Pre X1 is the top
of the line ESS Sabre32 9018 digital-to-analog converter, specialized for
computers or other sources that deliver high levels of timing errors. The ESS
Sabre³² DACʼs patented jitter-reduction circuit re-clocks the digital signal to
less than one picosecond before passing it through its high-resolution
processor.

Pre-Amp: The Grand Pre X1's preamp is designed to maintain the quality of
the digital-to-analog conversion through a short signal path avoiding noise and
signal loss. A dual mono gain control is used, measuring .025db channel to
channel, creating pinpoint imaging for a virtual 3D soundstage. Its wide
dynamics and black backgrounds are created by discrete Class A output stages
with up to 18V output.

Galvanic Isolation: Galvanic Isolation blocks electrical
noise from all of the digital inputs on the Grand Pre X1. Computers and digital
streamers are prime sources of electrical noise. Electrical noise, even noise
that you can't hear directly, masks fine details and distorts the tone of music.
Galvanic isolation eliminates this noise.

Tube Buffer: The Grand Pre X1 employs a Bascom King hybrid tube design
using two musically legendary 12AU7s. The tube buffer will smooth the harsh
digital edge found in poor recordings and compressed audio. A tube bypass
button, found on the remote control, allows for solid state or hybrid tube
listening modes. This is also possible when using the built-in high-performance
headphone amplifier.

Tube Window: The Grand Pre X1 features two tube windows which
allow you to view the glow of the unit's tube (mainly for show).

Controls

Power Switch: The main power switch is located on the
rear-panel of the Grand Pre X1. Once the main power switch has been turned on, you
can power on/off the preamp/DAC from the front power button or remote control.

Remote Control: The Peachtree Audio Grand Pre X1 includes an IR remote
control for wireless operation of the preamplifier/DAC.

Volume Control: The front-panel volume control is motorized from the
remote control and has a button indicator to allow the user to see levels from a
distance.

Digital Filter Slope: User selectable DAC filter slopes allow for a
sharp slope which measures better and a soft slope that is preferred by many
audiophiles.

AUX/HT Bypass Switch: This switch selects between Home Theater Bypass
mode or Standard AUX Line Input mode. In HT Bypass mode, it allows you to
integrate the Grad Pre in to a home theater system by making AUX 1 a
"throughput" for the surround processor. This allows you to use amplifier
connected to the Grand Pre X1 for stereo use and for the front left and right
speaker in your home theater.

Note: Do not switch to HT Bypass mod while the Grand Pre X1 is
actively playing music or a soundtrack through the Aux input.

High-Pass Switch Selector: When this switch is activated, the unit's
High Pass Pre-Out outputs at 80Hz and above with a 12dB/octave slope. This high
pass filter mode is advised when using a small satellite speaker with a
subwoofer.

Phase: When activated by the remote, both channels of the preamp
output will be 180-degrees out of phase. This is used to correct sources that
stream signal out of phase to the Grand Pre X1.

Connections

Asynchronous USB Port: The Peachtree Audio Grand Pre X1 is equipped with a USB
(type-B)
port to connect to your computer. It is 24-bit/192kHz capable, accepting 44.1,
48, 88.2, 96, 176.4, and 192khz sampling rates, and uses the latest in
asynchronous I2S communication. Asynchronous allows the Grand Pre X1's internal
high-precision clock to control the flow of data coming from the computer. This
method lowers incoming jitter so the Sabre DAC has less timing errors to reclock.
The galvanic isolated input eliminates noise generated by your computer's
switching power supply and greatly improving the sound quality.

Note: The Grand Pre X1 uses an XMOS receiving chip. This makes
high resolution audio easier for your computer to handle because it requires no drivers for
Mac OS and a very simple driver setup for Windows (using included XMOS Driver
for Windows CD-ROM); plus it uses less RAM, so your
computer has more headroom and sounds better.

Optical & Coaxial: The Peachtree Grand Pre X1 is
equipped with two optical (24-bit/96kHz) and two coaxial (24-bit/192kHz) digital inputs for connecting external
digital audio sources such as a CD or DVD player.

BNC Digital Input: The Grand Pre X1 also features a BNC digital input
(75-ohm)
which is found on high-end computer soundcards and some pro audio products. This
input will accept up to 24-bit/192kHz audio.

Pre-Out: The unbalanced RCA preamp-out connections (8V
rms/11.2V peak, 448-ohms) will allow you to
use an external amp with the Gran Pre, and also provide connections for a
subwoofer.

High Pass Pre-Out: This unbalanced RCA preamp output will operate in
full frequency band when the High Pass switch isn't activated. When the switch
is activate, it outputs at 80Hz and above with a 12dB/octave slope. This high
pass filter mode is advised when using a small satellite speaker with a
subwoofer.

Line Output: This fixed RCA output (2V rms, 448-ohms) will allow you to feed the Grand
Pre's sources into another preamp input.

12-Volt Triggers: The 12-volt input & output triggers enable automatic
turn on and off from or to another source with the same feature (2-12V) .

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The One To Own

Written By dhd, Howell County, MO on Friday, July 25, 2014

Incredibly versatile, beautiful, substantial, with serious sonic presence plus 12AU7s to soften the digital sound and an excellent remote. For those using multiple inputs, from phono to tuner to USB to coax and optical digital, who want audiophile sound, this unit can't be beat anywhere near the price. Too bad it's no longer made!

Pros:Build quality, multiple inputs, tube buffer, remote control

Cons:Wish it had a third Aux input in place of one of the OPTs, in order to keep tape source permanently connected.